Coking retort oven



Jar-r. 31, 1928.

F. A. BREDEL COKING RETORT OVEN Filed March '7. 1924 IN'VE/vroz F f5', rea/ www ATTOENEXS Patented Jan. 31, 1928.

UNITED STATES `FIREIDElIlEtIClIK A. BREDL, 0F ST. LOUIS, MSSOURI.

COKING RETORT OVEN.`

v `nppncmnn mea March v,

This invention' relates to vcoking retort ovens, and particularly,'to a coliing retort oven oi the kind described in U. S, Patent No. 1,374,546, to Joseph Becker, dated April l2, 1921, wherein the side walls ot each coking chamber contains verticalilame flues or combustion lues whose upper ends communicate with horizontally-disposed collection tlues or bus lines that are connected together in pairs in such a way that thegases or products of combustion used to heat each coking chamber` canbe directed upwardly through 'the combustion lues in one side wall V,of a coking chamber, then across the l5 upper end of said chamber, and thereatter downwardly through the combustion tlues in the other side wall of said chamber. Each e horizontal bus flue increases gradually in depth from its outer ends towards its middle l0 so as to distribute the flowy of thegases equally through the vertical combustion flues in the side walls of the coking chamber with which said bus lines communicate, and said bus lues are arranged in the ext-reine upper' ifi end portions of the side walls of the colring chambers. Due to the tact' that the bus {iues oit' prior coking retort ovens ot-this general type are located in the side walls of the gas spaces, at the upper ends ot the coking chambers, there is a tendency ttor the gases that are evolved from the coal to become overheated, thereby resulting in the formation of large quantities of lamp black. `The main object of my invention is to provide a coking retort oven that will produce a larger quantity and a better quality of fuel or illuminating gas from a given quantity of coal than can be obtained with an oven of the construction shown in said 40 Becker patent.

Another object of my invention is to provide a eoking retort oven that has the desirable characteristics and features of theV oven described in said Becker patent, but which is constructed in such a way that there is little liability of the gases evolved from the coal becoming superheated, due to too high temperature of the side walls oithe gas spaces at the upper ends of the cokng :'10 chambers. To this end I propose to arrange the horizontal bus fines of a coking retort oven ot the kind described in said Becker patent at a lower level than the gas spaces at the upper ends of the coking cham* bers, thereby preventing the side walls ot 1924. 'serial no. 697,559.

said gas spaces from becoming overheated, as is liable to occur iithe productsof conibustion used to. heat the oven are caused to circulate through flues inthe side walls of saidgas spaces. The bus fines are tapered in such a way that each bus flue increases gradually in depth from its opposite ends towards the middle of same, but instead of having the top walls of the bus flues slope upwardly, as illustrated and described in said Becker patent, I provide each bus line of my improved oven with a top wall that is disposed horizontally, or substantially so, and a bottom wall that slopes downwardly from the opposite ends of the Hue towards the middle or' same, thereby causing the hottest zone of the coking chamber to be located at a point well below the top surface of the coal in said chamber.

Figure l of the drawingsv'is a vertical cross sectional View of a portion of alcoking retort oven constructed in accordance with my invention.

VFigure 2 is a vertical.longitudinal sectional view of 'a portion of the oven, taken on the line 2v2 of Figure l, illustrating one of the coking chambers and the verticallydisposed combustion lines and -bus lines-incolring chamber, and C designates horizontal n bus flues or collection fiues in the side walls of the colring chamber that communicate with the upper ends of the combustion lues B. The combustion lues B in' each side Wall of the eoking chamber communicate with a separate horizontal bus flue C and the two bus lues that are associated with the coking chamber are connected together by a gas passageway D, as shown in Figure 3, thereby permitting the gases or products of combustion used to operate the oven to be directed upwardly through the kcombustion fiues B at one side of the coking chamber, then across the upper end of said chamber through the `passagewvay D, and then downwardly through mately the Same level as the topwalls 1y of the horizontal bus iues C, thus leavin'ga space between the top `surface of thekcoal a; and the top wall of the coling chamber A (designated by the reference character 2 in Figure 3) for the gases that are evolved from the coal. is inoperation the producte` of combustion used 4to heat the coking chamber A will circulate around the portions ot' the side walls of said chamber that contact with the coal, but will not circulate around the SideY walls of the gasspace at the .upper end ofthe coking chamber A. Therefore, there is little liability of the gases evolved from the coal being superhcatedor ovcrlieated to such an extent ae toresult inthe` formation of large quantiiiesof lamp black. o l

Each horizontal `bus llue C is tapered from its ends towards; its middle, `as shown in Fig ure 1, but instead of obtaining the taper vby slopingthetopwall of'said llue upwardly, as in the Becker patent, I provide each bus flue offmy improved oven with a top wall l that is disposed substantially horizontally and a bottom wall that sloped` downwardly from the opposite ends of said line towards the middle of the flue.'V Accordingly my improved ovenfis distinguished from the oven described in said Becker patent, not only by reason ot' the fact that the horizontal bus y ii'uesin the side wallsot' the coliing chamber are located at a point below, or approximate- Consequently, when the ovenY ly below, the level of the coal in the coking chamber, but al'soby reason of the fact that aid bus fines are ol" such crosslsectional shape that the deepest portion of each bus liue'extends downwardly away from the gas space at the upper end of the coking chamber', in'stleat'l of extending upwardly into the side wall ot' said gas space.

ylVhile have herein illustrated my invention embodied in a crosa` regenerative coking oven, I wish it to be understoodthat my invention is applicable to a recuperative coke oven ot the kind wl1e1'ein`tlie combustion gases ascend one Set of heating fines at one side of the. cokiiig chamber and descend the irrespondingr linear at the` opposite side of Saidchaniber withoutreversing.

Having tlniadcacribed my invention, what l claim as new and desire to Secure by Letterslateutis: Y

A coking retort oven provided with arcol ing chamber, horizontal bus linee in cach oli the lside walls of said colting chamberhaving liorizmitally-disposed top walls arranged at a point substantially below the top' wall oil: said coking chamber and having inclined bottom walls that slope downwardly from the ends ot'ieach of said bus lines towards thc middle portions` thereof, vertical combustion I'lues in the side walls ol said coking chamber whoe'e upper ends conununicatc with said buh4 llues, and a paesageway extending transversely across the top wall of the coking chamber foifestablishing connnunication between said bus lines at the middle'portionsof each iof the latter.

FREDERICK A. BREDEIJ.

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